Valve-in-head motor



Jan. 29 1924.

J. w. IRVIN VALVE-IN-HEAD MOTOR Fild Jan. 11, 1923 2 Sheets-Sheet 1 J.W. IRVIN vALvE-IN-HEAD MOTOR Jan. 29 1924,

2 Sheets-Sheet 2 Filed Jan. 11 1923 Patented Jan. 29, 1924.

UNITED STATES PATENT OFFICE,

JOHN W. IRVIN, OF FRANKLIN, NEBRASKA, ASSIGNOR OF TWO-FIFTHS TO K. J.WAY, OF HASTINGS, NEBRASKA.

VALVE-IN-HEAJD MOTOR.

Application filed January v11, 1923. Serial No. 612,053.

7 '0 all whom it may concern:

Be it known that I, JOHN W. IRVIN, a citizen of the United States ofAmerica, residing at Franklin, in the county of Franklin and State ofNebraska, have in all times; and with this object in View theinventionconsists in a construction and. combination of parts of which apreferred :0 embodiment is shown in the accompanying drawings, whereinF'gure 1 is a vertical sectional View of the contents of a motor havinga construction embodying the invention.

Figure 2 is a transverse sectional view of the same.

Figure 3 is a horizontal sectional view thereof.

Figure 4 is a vertical sectional view of the rear end of the motor.

The cylinder head 10, valves having th stems 11 and seating springs 12are of conventional construction.

Associated with the valve stems in operative relation thereto is a camshaft 13 having the cams 14 for respective actuation of the valve stemsto unseat the valves in timed relation with the operation of thecylinder pistons (not shown). Interposed between the camshaft and thevalve stems are valve fingers 15 forming elements of rockers of whichthe lmuckles or heads 16 are mounted upon a pivot rod 17 extendinglongitudinally of the motor and are seated in an oil channel 18 alsoextending longitudinally of the motor and forme in the constructionillustrated in an upward enlargement 19 0f the cylinder head.

The valve fingers are provided at their free ends with adjusting bolts20 forming tappets for direct contact with the valve stems and are alsoprovided in the paths of the cams 14 with cushioned contact elements 21consisting preferably of rawhide inserts or pads aving a durable wearingquality and affording a noise eliminat- H10 contact for the cams.

urthermore extended longitudinally in overhead relation with the camshaft is an oil feed tube 22 orificed at intervals as shown at 23 in thevertical planes of the cams so as to provide a drip of oil foreachcam'to be conveyed thereby to the surface with which it contacts.The feed tube may be supplied from any suitable source and by anypreferred pressure device such as a pump (not shown) and at its rear endit is provided with a branch 24 discharging into the oil channel 18 inwhich the heads or knuckles of the valve fingers are seated. This'oilchannel being extended-to the front end of the motor to insure a supplyof oil. to the rockers throughout the series, discharges into the crankcase through the guard 25 which is provided for the chain 26 by whichmotion is communicated from the crank shaft to the cam shaft. While thisis a suitable preferred method of completing the circulation of the oilto the end that there may be no waste thereof while insuring a s upplyto the essential parts of the valve operating mechanism, it will beunderstood that modifications of this arrangement may be adopted to suitdifi'ere'nt types of motors provided the principle of circulation toinsure the deposit of the surplus oil in the crank case is observed tothe end that there may be no excessive and unnecessary expenditure ofoil due to the continuous supply thereof to the elements of the valvemechanism.

The overhead cam shaft rockers and related devices including the valvestems and their spouts, are preferably arranged within a housing 27surmounting the cylinder head and interiorly accessible by means of aremovable cap plate 28.

Having described the invention, what is claimed as new and useful is 1.A valve-in-head motor having an over- 100 head valve actuating camshaft, rockers provided with fingers interposed between the valve stemsand the cams on the cam shaft, means for operating said cam shaft, andcushioned contact elements consisting 1 of pads having a durable wearingquality inset in the rockers and afiording noise eliminating contact forthe cams.

2. A valve-in-headmotor having an overhead valve actuating cam shaft,rockers provided with valve fingers interposed between the valve stemsand the cams of the cam shaft, means for operating said cam shaft, anoil channel extending longitudinally of the motor and cross sectionallyconforming to the rockers, means for pivotally mounting the rockersconcentric with the channel, and means for supplying lubricant to thechannel.

3. A valve-in-head motor having an overhead valve actuating cam shaft,rockers having valve fingers interposed between the valve stems and thecams of the cam shaft, means for operating said shaft and an orificedoil feed tube arranged in overhead relation with the cam shaft, therockers being mounted in a continuous oil channel in communication withsaid oil feed tube.

4. A valve-in-head motor having an overhead valve actuating cam shaft,rockers having valve fingers interposed between the valve stems and thecams of the cam shaft, means for operating said shaft and an orificedoil feed tube arranged in overhead relation with the cam shaft, therockers being mounted in a continuous oil channel in communication withsaid oil feed tube and disposed to discharge into the crank case.

In testimony whereof he affixes his signature.

JOHN W. IRVIN.

